IRCTC
Denial of refund when train was late for more than 3 hours

I have booked a ticket for my mother from Renigunta to Secunderabad under Tatkal quota through IRCTC online ticket booking website.

As per the refund rules, a TDR can be filed if train runs late by 3 hours or more. As the particular train got delayed by more than 3 hours on that day, I filed a TDR. However, IRCTC denied refund as the ticket was booked under Tatkal quota. I don't think it is fair on railways part to to escape by showing this reason. If train is delayed, every passenger suffers equally no matter under which quota they booked the ticket.

Ticket PNR# 4414073532

TDR Reference # ekt201001240990160